C because a market research helps when you are buying something which he is (car) and this is a secondary resource because it is recommended by someone rather than them finding the research himself.
Answer:
focus on studying, that means they want you to be studying more than anything else, maybe even do advance studying by yourself. Do some chores as well :D when ur old enough like 15 - 16, get a partime job to help your parents. but if it effect your studyin, just focus on your studying
